TY  - JOUR
AU  - P. I. Topalov
TI  - The action variable and the Poincaré Hamiltonian in a neighbourhood of the critical circle
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1995
SP  - 216
EP  - 217
VL  - 50
IS  - 1
UR  - http://geodesic.mathdoc.fr/item/RM_1995_50_1_a13/
LA  - en
ID  - RM_1995_50_1_a13
ER  -